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United States Patent | 5,230,641 |
Wharton | July 27, 1993 |
An electrical receptacle which has a plastic housing defining a socket lined by a tubular sleeve contact for receiving a conventional electrical adapter plug. The adapter plug has a body supporting a contact tip which is either retractable or non-retractable. This contact tip projects from an end of the adapter-plug body to mate with a central contact located at one end of the receptacle socket. The adapter plug also has another contact which projects from the periphery of the adapter-plug body to mate with the sleeve contact of the receptacle. The central contact of the receptacle is carried on a support fixed to the housing which communicates with the receptacle socket to establish electrical circuit connection with the adapter-plug contact tip in response to the insertion of the adapter plug into the socket. The central contact is spring-loaded and movable relative to its support so as to provide a retracting movement in response to the force applied by an adapter-plug contact tip. The spring-loaded retracting action of the central contact establishes and maintains a reliable circuit connection particularly with respect to an adapter plug which has a fixed contact tip. The retracting movement of the central contact assumes a reliable electrical connection between an adapter plug inserted in the receptacle in response to vibration of either or both the adapter plug and the receptacle.
Inventors: | Wharton; Richard F. (Glenview, IL) |
Assignee: | Safco Corporation (Chicago, IL) |
Appl. No.: | 925189 |
Filed: | August 6, 1992 |
Current U.S. Class: | 439/668; 439/700; 439/824 |
Intern'l Class: | H01R 017/18 |
Field of Search: | 439/578-585,700,824,295,668,669,638 |
1264255 | Apr., 1918 | Anklam | 439/700. |
2010452 | Aug., 1935 | Douglas | 439/700. |
2480963 | Sep., 1949 | Quinn | 439/700. |
3032741 | May., 1962 | Fitzgerald | 439/824. |
3955876 | May., 1976 | Knuppel | 439/700. |
4591222 | May., 1986 | Shaffer | 439/700. |